Improvement in rotary pumps



c UNITED STATES PATENT OFFICE.

BENJAMIN E.' TABER., or BUFFALO, NEW Yoan.

IMPROVEMENT IN ROTARY PUMPS.

Specification forming part of Letters Patent Nori-3,550, dated October 22, 1861.

To all whom it mfay con/cern,

v Be it known that I, BENJAMIN F. TABER, of`

` w the city of Buffalo, county of Erie, and State \ence being had to the accompanying drawthereon, in which- Figure I is a Vertical transverse section. Figli 1s avertieal longitudinal section upon ings and the'letters of reference markedw the lines l l and c d.

f Letters of like name and kind refer to like parts in each of the figures.

-A represents the inclosing case or-shell,

' .havin-g a suction-orilice B at the bottom and a discharge-orifice C at the side.

D represents a valve-cylinder throu gh or in 'which the valves E work. Its diameter is Y about three-fourths the'diarneter of the shell.

In determining the form of the shell and the position of the valve-cylinder within it a perpendicular line c d is drawn through the center of the valve-cylinder- Two other lines e f and g h are also drawn Vthrough the center at angles of forty-tiveqdegrees to the line c'd, dividing t-he valve-'cylinder into four equal parts. A part of the shell on the side of the discharge-Orifice is the quadrant of a circle concentric with the valve-cylinder and, of equal radius. The valve-cylinder revolvesin close contact with this part of the shell, form-A ing an abutment which causes the discharge of the liquid being pumped. The shell directly' opposite is also the quadrant of a circle concentric with the valvelcylinder, but of greaterradius, (as before mentioned forming the suction-space F. The curves connecting the extremities of ythe quadrants are such that' any line drawn throughthe center of `the valve-cylinder and terminating in them, as 7b -j, will be equal to a" diameter drawn. though` the same center and terminating in the quadrants, thus making all diameters of the shell which pass through the center of the valvecylinder of equal'length.

The suction-orifceB opens into the shell at the bottom between the-quadrants, but ex-4 pands upon Ione side to the commencement, The discharge-ori-f of the greater quadrant. ce C commences at the opposite end of the shell.

greater quadrant at the longitudinal center of the case and quickly expands to nearlyits full length andl extends to the commenceinent of the lesser quadrantor abutment.

G represents the shafts or journals upon which the valve-cylinder revolves. They are `connected to the-valve-tylinder at each end causing the valves to move steadily and without binding. Such portions of the Valves'as during their revolution are outside of the valve-cylinder'are made solid, and these solid parts are connected together by the arms E', so as to allow them to work past or through each other. By dividing each valve into two parts by separating the arms in the center, as shown at k', the centrifugal force will cause `them to revolve in contact with the shell, even though they may have becometoo short by Wear upon their ends.-

.l `represents the case-heads, through which the Ashafts G work water-tight by means ot the stuiiing-boxes L.

Motion is given to the valve-cylinder by means of 'a crank or pulley placed upon the end of the shaft G. The valve-.cylinder revolves in close contact with .the shelll upon one side of the suction-orifice and' the ends of `the `valves upon the other, thus causing a suction which will drawithe liquid into the As the valves pass around they will carry the liquid before them and discharge it through the orice'C. The greater and less quadrants being concentric with eachother and with the valve-cylinder, `it is evident that while the valves are moving over them they' (the valves) will remain stationary in the valve-cylinder. f Itis during this part of their -revolution that the valves do their work' both of drawing in. and discharging-the liquid.

As they pass these quadrants their ac`tion' upon the liquid ceases, so that while the ec At thesides of each of the valves' in the valve-cylinder prevent and pushing out the lower end to be ready t'or its Work, there is no strain on the valves, so that the friction of the valves in the valvecylinder is greatly diminished: The discharge-orifice does not extend the Whole length of the shell,4 (as before mentioned,) anarrow bearing being left at each end, as shown at mf, which retains the true form of the eccentric part, and being sufficient. (on account of the slight strain upon the valves at this time) to move them into place as they successiveb1 come around. i The peculiar form of the discharge-milice i andits location with that ot' the suction-orifice between the quadrants with the Working my pump from clogging or 'choking up when used for pumping panncrs" liquor, which contains bark or any other liquid containing foreign solid substances. 1

Having thus fully described my invention, what I claim, and desire to secure byLett-ers Patent, is f i 1. The formation of the shell with the concentric parts 'e g and f h and eccentric parts e 71l and g f, as and for the purposes described. 2. So constructing and arranging the Valves,

valve-cylinder, and shell I as that the Valves j Will not be subjected to a transverse movement while doing their worin-for the purposes and substantially as set forth.l

l. F. TABER.

Vitnesses:

JAMES A. ALLEN, W. II. FoRBUsH. f 

